Tri-state overrunning clutch

Abstract

The invention provides a tristate superior clutch, which comprises an outer ring, an inner ring, a plurality of wedgy blocks positioned between the outer ring and the inner ring and an outer retaining frame and an inner retaining frame which are positioned between the outer ring and inner ring and used for retaining the blocks. A plurality of circular arc grooves are arranged on a working face of the outer ring; each circular arc groove is matched with a working face of the corresponding wedgy block and retains the working face in the circular arc groove. The inner retaining frame is provided with a plurality of convex plates which extend outwards along the axial direction; each convex plate is provided with an oblique hole which is oblique corresponding to the axial direction. A poking disc which can slide in the axial direction is arranged on the peripheral surface of the outer ring; a plurality of poke rods which are respectively inserted into the corresponding oblique hole are fixed on the poking disc. Through moving the poke rods of the poking disc to control the wedgy blocks to fully leave a working face of the inner ring, the outer ring and the inner ring can freely rotate in a positive direction and a negative direction, thereby obtaining a bidirectional separation working state of the tristate superior clutch.

Description

technical field [0001] The invention relates to an overrunning clutch, in particular to a three-state overrunning clutch, which can control the inner ring and the outer ring of the overrunning clutch to be completely disengaged from each other so as to freely rotate in forward and reverse directions. Background technique [0002] An overrunning clutch, also known as a one-way clutch or a one-way bearing, is a device that can only transmit torque in one direction of rotation. Existing overrunning clutches mainly include roller type overrunning clutches and sprag type overrunning clutches. [0003] As an example of a sprag type overrunning clutch, CN 2476675Y (or CN 1430000A) discloses a kind of overrunning clutch with double cages, the overrunning clutch includes an inner ring and an outer ring, and a plurality of Wedges, and these wedges are held by the holding holes opened in the double cage (including the inner cage and the outer cage) between the inner and outer rings. ...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing overrunning clutches, the overrunning state and wedging state of the overrunning clutch are realized through the relative rotation between the inner and outer rings, and the clutch itself has no additional mechanism to control the working position of the sprags, so there are The problem is that the overrunning clutch only has a one-way overrunning state and a one-way wedging state, and has a single function

In some specific construction machinery applications, when the overrunning clutch is required to rotate at high speed, the driving part and the driven part are completely separated, that is, the driving part and the driven part can not interfere with each other, and the one-way overrunning of the overrunning clutch limits the this function

At the same time, when the clutch is in the high-speed overrunning state, the wedges are in contact with the inner and outer rings, so there are problems of wear and heat, which will affect its service life

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